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package main
import (
"flag"
"fmt"
"log"
"os"
"path"
"path/filepath"
"strings"
"rescribe.xyz/bookpipeline"
)
type Pdfer interface {
Setup() error
AddPage(imgpath, hocrpath string) error
Save(path string) error
}
const pageWidth = 5 // pageWidth in inches
// pxToPt converts a pixel value into a pt value (72 pts per inch)
// This uses pageWidth to determine the appropriate value
func pxToPt(i int) float64 {
return float64(i) / pageWidth
}
func walker(pdf Pdfer, colour bool) filepath.WalkFunc {
return func(fpath string, info os.FileInfo, err error) error {
if info.IsDir() {
return nil
}
if !strings.HasSuffix(fpath, ".hocr") {
return nil
}
imgpath := ""
if colour {
p := strings.SplitN(path.Base(fpath), "_bin", 2)
if len(p) > 1 {
imgpath = path.Join(path.Dir(fpath), p[0] + ".jpg")
} else {
imgpath = strings.TrimSuffix(fpath, ".hocr") + ".jpg"
}
} else {
imgpath = strings.TrimSuffix(fpath, ".hocr") + ".png"
}
return pdf.AddPage(imgpath, fpath)
}
}
func main() {
// TODO: handle best
// TODO: probably take flags to resize / change quality in due course
colour := flag.Bool("c", false, "colour")
flag.Usage = func() {
fmt.Fprintln(flag.CommandLine.Output(), "Usage: pdfbook [-c] hocrdir out.pdf")
flag.PrintDefaults()
}
flag.Parse()
if flag.NArg() != 2 {
flag.Usage()
return
}
pdf := new(bookpipeline.Fpdf)
pdf.Setup()
err := filepath.Walk(flag.Arg(0), walker(pdf, *colour))
if err != nil {
log.Fatalln("Failed to walk", flag.Arg(0), err)
}
err = pdf.Save(flag.Arg(1))
if err != nil {
log.Fatalln("Failed to save", flag.Arg(1), err)
}
}
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